Fig. 3: Charge density wave and (bi)polarons.
From: Competing electronic states emerging on polar surfaces
a Side view of the CDW (electronic charge represented by gray cloud); insets show the spin-resolved DOS projected on the TaO2 layers (arbitrary units), the top view, and the simulated filled-state STM signal. Side view, top view, and DOS for the mixed configuration of single-electron polarons and bipolarons (b) and the bipolaron [110] arrangement (c). Yellow and gray colors represent the polaronic charge density at high and low isosurface levels, respectively.
